<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8>
<style>
span {
  font-family: Malgun Gothic, sans-serif;
  font-size: 32px;
  line-height: 64px;
}
</style>
</head>
<body>
<!-- stray U+115f should be invisible and not contribute any space -->
<span>a&#x115f;b</span>
</body>
</html>
